SandboxJS: Sandbox escape via Function.caller leakage of internal call op_CVE-2026-43898

{
    "lastseen": "",
    "description": "SandboxJS is a JavaScript sandboxing library. Prior to 0.9.6, sandbox-defined functions expose Function.caller, allowing sandboxed code to recover the internal LispType.Call runtime callback. That callback can then be invoked with attacker-controlled fake context and obj values to extract blocked host statics, recover the real host Function constructor, and execute arbitrary host JavaScript. This vulnerability is fixed in 0.9.6.",
    "published": "2026-05-28T17:50:31.581Z",
    "modified": "2026-05-28T17:50:31.581Z",
    "type": "cve",
    "title": "SandboxJS: Sandbox escape via Function.caller leakage of internal call op",
    "source": "GitHub_M",
    "references": "https://github.com/nyariv/SandboxJS/security/advisories/GHSA-g8f2-4f4f-5jqw\nhttps://github.com/nyariv/SandboxJS/commit/826865251232611ec94078bab5a18ec875dad4a5",
    "id": "CVE-2026-43898",
    "bulletinFamily": "",
    "cwe": [
        "CWE-94"
    ],
    "cvelist": null,
    "sourceData": "nyariv SandboxJS < 0.9.6",
    "sourceHref": "",
    "cvss": {
        "score": 10,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "SandboxJS",
    "version": "< 0.9.6",
    "vendor": "nyariv",
    "ai_description": "Sandbox escape via Function.caller leakage of internal call op",
    "ai_severity": "Critical",
    "ai_vendor": "nyariv",
    "ai_product": "SandboxJS",
    "ai_version": "< 0.9.6",
    "ai_score": 10
}